<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" v-model="allChecked" />
    </label>
    <span>
      <span>已完成 {{ isDoneNum }}</span> / 全部 {{ totalNum }}
    </span>
    <button
      class="btn btn-danger"
      v-show="isDoneNum"
      @click="$emit('delAllTodo')"
    >
      清除已完成任务
    </button>
  </div>
</template>

<script lang="ts">
export default {
  name: "Footer",
};
</script>

<script setup lang="ts">
import { computed } from "vue";

const props = defineProps<{
  isDoneNum: number;
  totalNum: number;
}>();

const emit = defineEmits(["updateAllTodo", "delAllTodo"]);

const allChecked = computed({
  get() {
    // return props.isDoneNum === props.totalNum && props.totalNum > 0;
    return props.isDoneNum === props.totalNum && !!props.totalNum;
  },
  set(val) {
    emit("updateAllTodo", val);
  },
});
</script>

<style scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
